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  1. 08 Jun, 2011 5 commits
    • Josef Bacik's avatar
      Btrfs: fix the allocator loop logic · 723bda20
      Josef Bacik authored 
      I was testing with empty_cluster = 0 to try and reproduce a problem and kept
hitting early enospc panics.  This was because our loop logic was a little
confused.  So this is what I did

1) Make the loop variable the ultimate decider on wether we should loop again
isntead of checking to see if we had an uncached bg, empty size or empty
cluster.

2) Increment loop before checking to see what we are on to make the loop
definitions make more sense.

3) If we are on the chunk alloc loop don't set empty_size/empty_cluster to 0
unless we didn't actually allocate a chunk.  If we did allocate a chunk we
should be able to easily setup a new cluster so clearing
empty_size/empty_cluster makes us less efficient.

This kept me from hitting panics while trying to reproduce the other problem.
Thanks,
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
      723bda20
    • Josef Bacik's avatar
      Btrfs: fix bitmap regression · 2cdc342c
      Josef Bacik authored 
      In cleaning up the clustering code I accidently introduced a regression by
adding bitmap entries to the cluster rb tree.  The problem is if we've maxed out
the number of bitmaps we can have for the block group we can only add free space
to the bitmaps, but since the bitmap is on the cluster we can't find it and we
try to create another one.  This would result in a panic because the total
bitmaps was bigger than the max bitmaps that were allowed.  This patch fixes
this by checking to see if we have a cluster, and then looking at the cluster rb
tree to see if it has a bitmap entry and if it does and that space belongs to
that bitmap, go ahead and add it to that bitmap.

I could hit this panic every time with an fs_mark test within a couple of
minutes.  With this patch I no longer hit the panic and fs_mark goes to
completion.  Thanks,
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
      2cdc342c
    • Josef Bacik's avatar
      Btrfs: don't commit the transaction if we dont have enough pinned bytes · f2bb8f5c
      Josef Bacik authored 
      I noticed when running an enospc test that we would get stuck committing the
transaction in check_data_space even though we truly didn't have enough space.
So check to see if bytes_pinned is bigger than num_bytes, if it's not don't
commit the transaction.  Thanks,
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
      f2bb8f5c
    • Josef Bacik's avatar
      Btrfs: noinline the cluster searching functions · 3de85bb9
      Josef Bacik authored 
      When profiling the find cluster code it's hard to tell where we are spending our
time because the bitmap and non-bitmap functions get inlined by the compiler, so
make that not happen.  Thanks,
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
      3de85bb9
    • Josef Bacik's avatar
      Btrfs: cache bitmaps when searching for a cluster · 86d4a77b
      Josef Bacik authored 
      If we are looking for a cluster in a particularly sparse or fragmented block
group, we will do a lot of looping through the free space tree looking for
various things, and if we need to look at bitmaps we will endup doing the whole
dance twice.  So instead add the bitmap entries to a temporary list so if we
have to do the bitmap search we can just look through the list of entries we've
found quickly instead of having to loop through the entire tree again.  Thanks,
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
      86d4a77b
  3. 04 Jun, 2011 11 commits
  5. 28 May, 2011 1 commit
  7. 27 May, 2011 1 commit
  9. 26 May, 2011 4 commits
  11. 23 May, 2011 18 commits
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